Journal ArticleDOI
Photoisomerization in different classes of azobenzene
TLDR
This critical review details the studies completed to date on the 3 main classes of azobenzene derivatives and explains the mechanism behind the isomerization mechanism.Abstract:
Azobenzene undergoes trans → cisisomerization when irradiated with light tuned to an appropriate wavelength. The reverse cis →transisomerization can be driven by light or occurs thermally in the dark. Azobenzene's photochromatic properties make it an ideal component of numerous molecular devices and functional materials. Despite the abundance of application-driven research, azobenzene photochemistry and the isomerization mechanism remain topics of investigation. Additional substituents on the azobenzene ring system change the spectroscopic properties and isomerization mechanism. This critical review details the studies completed to date on the 3 main classes of azobenzene derivatives. Understanding the differences in photochemistry, which originate from substitution, is imperative in exploiting azobenzene in the desired applications.read more
Citations
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Photoswitchable Arylazopyrazole-Based Ruthenium(II) Arene Complexes
TL;DR: In this paper, a new family of donor-functionalized photoswitchable arylazopyrazole-based ligands (3−5) was synthesized and characterized, and the new ligands have been employed to prepare a series of novel photowitchable half-sandwich ruthenium(II) cymene complexes of the type [(η6p-cymene)Ru(L)Cl]+ (L = 1-(2-methylenepyridyl)-4-(phenyldiazenyl)-3,5-dimethyl
Journal ArticleDOI
Dynamic induction of enantiomeric excess from a prochiral azobenzene dimer under circularly polarized light
TL;DR: It is demonstrated the simultaneous induction of chirality and enantiomeric excess from a prochiral azobenzene dimer via a chiral regioisomer formed in situ upon CPL irradiation.
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Strategies for Tumor Hypoxia Imaging Based on Aggregation‐Induced Emission Fluorogens
TL;DR: This work demonstrates several hypoxia-responsive probes based on AIEgens in recent three years, which may enlighten the construction of hypoxIA-responsive AIE probes used for tumor Hypoxia imaging in the future.
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Thermal, Photochromic and Dynamic Properties of Water-Soluble Spiropyrans
TL;DR: In this paper, the authors present photometric steady-state and ultrafast time-resolved pump/probe spectroscopic measurements on water-soluble derivatives of these three spriopyrans and reveal significant differences between the nitro-substituted spiropyrants and Py-BIPS.
Journal ArticleDOI
ortho-Fluoroazobenzene derivatives as DNA intercalators for photocontrol of DNA and nucleosome binding by visible light
TL;DR: A high-affinity photoswitchable DNA binder, which displays different nucleosome-binding capacities upon visible-light irradiation, sets the basis for developing new optoepigenetic tools for conditional modulation of nucleosomal DNA accessibility.
References
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Journal ArticleDOI
Photomechanics: directed bending of a polymer film by light.
TL;DR: It is shown that a single film of a liquid-crystal network containing an azobenzene chromophore can be repeatedly and precisely bent along any chosen direction by using linearly polarized light.
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Light-driven motion of liquids on a photoresponsive surface
TL;DR: The light-driven motion of a fluid substance in a surface-modified glass tube suggests potential applicability to microscale chemical process systems.
Journal ArticleDOI
Design and synthesis of chromophores and polymers for electro-optic and photorefractive applications
TL;DR: The ability of nonlinear optical materials to transmit, process and store information forms the basis of emerging optoelectronic and photonic technologies as discussed by the authors, where organic chromophore-containing polymers, in which the refractive index can be controlled by light or an electric field, are expected to play an important role.
Journal ArticleDOI
Ultrafast Dynamics of Photochromic Systems.
Naoto Tamai,Hiroshi Miyasaka +1 more
TL;DR: Reaction dynamics of the photochromic systems such as spiropyran, flugide and diarylethene derivatives in femto- to nano-second time region was reviewed and mechanisms of rapid reaction channels in various phases were discussed.